Planograpii co



L. KAPLAN.

CALIPERS.

APPLICATION FILED SEPT. I4. 19|?.

Patented Oct. 7,1919.

- 2 SHEETS-SHEET I CALIPERS.

APPLICATION man SEPT. 14. |911.

1,317,708. vP11/rented Oct. 7,1919.

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LADISLAV KAIPLAN, OF CLINTON, CONNECTICUT.

CALIPERS.

Specification of Letters Patent.

Patented Oct. '7, 1919.

Application led September 14, 1917. Serial No. 191,401.

To all whom t may concern.'

Be it known that I, LADIsLAv KAPLAN, a citizen of the United States, residing at Clinton, in the county of Middlesex and State of Connecticut, have invented a new and useful Calipers, of which the following is a speciiication.

rlhis invention relates to certain new and useful improvements in calipers and particularly to that type which is known in the art as inside calipers.

The main object of this invention is to provide a calipering device which consists of two arms pivotally mounted upon a handle and a means associated with the arms so that a movement of one correspondingly moves the other arm in an opposite direction to the same degree.

Another object of the invention is to provide a rotating indicator which acts in unison with the openingr and closing movements of the arm members and readily shows at a glance the distance between the arm members.

A further object of the invention is to provide an inside calipering device which may be manually operated to bring the arms together in a closely related position so that the device may be readily applied to the interior of the article to be measured and a spring tension means for spreading or opening the arms to ascertain4 the measurement.

A still further object is to provide an inside calipering device with a vstop means whereby the degree of outward movement of the arms may be regulatedV or set.

Other objects and aims of the invention, more or less broad than those stated, together with the advantage inherent, will be in part obvious and in part specifically referred to in the course of thel following descriptionof the elements, combinations, arrangement of parts, and applications of principals constituting the invention; and the scope o-f protection contemplated will appear from the claims. Y

In the accompanying drawings, which are to be taken as a part of this specification,

and in which I have shown a lmerely pre- Y ferred form of embodiment of the invention, Figure 1 is 'a front elevation partly broken away to give a clearer view of a detailed part; Fig. 2 is a rear elevation showing the manner in which the various parts intervinafter referred to.

mesh with each other; Fig. 3 is a partial front elevation with the indicating dial removed' to more vclearly illustrate the parts thereunder; Fig. 4 is a section on line 4.-4 Fig. 1; Fig. 5 shows the movable arm to which is attached the trigger by which the instrument is manually manipulated in one direction; Fig. 6 is a view of the movable arm and the stop mechanism associated therewith; Fig. 7 is a perspective viewf'of the arm shown in Fig. 6 illustrating more fully the interchangeability ofV a section thereof; Figs. 8 and 9 respectively the coilV spring' and the cap member into which it is seated; Fig. 10 is a detail view of the intermeshing gear element and its associated part; Figs. 11 and 12 respectively are views of the adjustable stop member and its operative nut; Fig. 13 represents the gear segment that meshes with the trigger arm; Fig. 1dr is the gear wheel that meshes with the opposite arm and Fig. 15 is a perspective View of the rear face of the dial. In the several views like reference numerals indicate similar parts.

Referring to the drawings more in detail l indicates a handle which is composed of a gripping portion 2 constructed of any p which may be made detachable as at`7 for the purpose of. substituting another arm of slightly different formation so that the instrument may be used to accomplish its lpurpose on articles of various shapes. The

arm 5 is provided with a gear segment 8 while the opposed arm 6 iscut out as at 9 and provided with a gear segment 10 facing inward or toward the segment v8 on the varm 5.

Integral' with they arm 54 is alateral eX- tension 11 the purpose of which vwill be here- To enable the arms to move rather freely ball bearings 12v are arranged between the various' movable parts around the ',pivoted centers.V One of the arms, preferably l6, is provided with an operating trigger 13 by whichit is manipu-VV lated in one direction.. I

causes A corresponding degree `of movement, but in the opposite direction, is transmitted to the'arm 5 by the operation of arm 6, through the employment of a gearing element which meshes with the gear segments'S andlO on the arms 5 and 6 respectively. rIhis gear element is composed of a pinion segmental gear 15, secured together in any f suitable manner and rotatably mounted i upon stud 16 secured tothe handle.

In order that the space between the arms readily'be ascertained,whenthe arms are` separated, without the use of a rule, or similar article, I employ a `dial'member 17 which is rotatably supported on ashaft 18. Onone endl of the s haftV 18 there is a cap member 19in which ya coiled V'spring 2O is Y housed. The outer convolution of the spring is provided with an odset portion 21 which is ,adaptedV to interlock intofthe slot 22 in Y Y the cap member and the inner convolution is perforated as at 23 so as vto interlock with a bur 24 formed on a sleeve 25 Asecurely fastened toithe dial member 17. This coil spring constitutes a tension means which causes the arms to always travel outward when the manual pressure is released; To

-the rear face of the dial member 17 Iand mounted securely kuponthe sleeve 25 isa spurgear 26.' The face of the dial adjacent its periphery is provided "with calibrations 27. c

Connected with the gear element that the armsr to move together isa segmentalI plate 28 which hasa cut out portion 29"andY an inwardly directed gear segment 3Q which meshes with the spur gear 26 on the dial 17 Vand therefore causes the dial to rotate correspondingly according'to the de-V gree of'movement of the arms. Y A pointer lgsecured in any suitableY manner to handle coacts with the calibrations on the Vdial to indicatel the amount of movement.

. `VThe Qperationfof the f In order that' the degree of movement Vof 4the caliper arms maybe limited in their outward movements, I provide a novel stop mechanismwhich is constructed as follows. Secured to the handle isa U shaped housing. 32within which is slidably mountedY a screwf member 33 the adjustments of the same being` controlled by a Ymilled nut 34. A slot y,35`is' made inthe handleto accom- -modate' the nutf85. An auxiliary housing 236@ PIOVded '.100 plOtGCt the rear end .of the .screw vmember 33. Pivotally kmounted on the lateral extension 11 of the arm 5 is a plunger 37, the free end o fwhich extends within the housing 32 V and coacts with the When inside measurement'of any article 'iscrdesired', manual pressure isnbrorig'lit to beariipon die trigger T13 .which .Causse through the itergearing means, both-arms 14 and a device is las follows if it is desiredthat the device should be set for any reason, as for future measurements, all that` is necessary to do is to manipulate the milled nut Sllfuntilthe screw member 33 'abuts against lthe end of the plunger '37. YThis will-prevent the arms from spreading under Ythe tension ofthe spring beyond this set Vposition when the caliper is removed from the article.l

l claim; Y

1 In aY calipering'device consisting of a handle, a pair of arms pivotally mountethereon, a trigger secured to one of said arms, and gear means carried by the arms and operatively connected with the'trigger whereby movement of the trigger relative itev said handle is correspondingly transferred Y in the opposite direction to theother arm.

2. In a calipering device consisting of a handle,'a pair of arms pivotally mounted thereon, a gearing carried by the arms and means carried by one of said arms and hav- Ying operative connection with the gearing twhereby a movement of one of vsaid arms relative tosaid handle is correspondingly opposite direction to the transferred in the other arm. B. yln a calipering` device lc onsisting of a handle, a pair of arms pivotally mounted thereon, gearV means carried by theV arms, means carriedV bv one of said arms' and having Operative connection with said kgear means wherebyY a movement ofrone of said arms relative to said handle is correspond ingly transferred inV the opposite direction --to the other arm, and a spring tensionV L' means carried by said/pivot for returning`Y` said arms. c f

4.' In a calipering device consisting of handlel.a pair of arms pivotally mounted thereon, atrigger securedto one Vof saidfrv arms, gear mea-iis carried bythe arms and Y operatively `connected withfzltheVv trigger whereby Aa yino'vementof'the trigger relative to.. Said handle Yis correspondingly; transferred inftli'eVv opposite directionfto the'otherarm and ameans for indicating the',degreeY` Y of movement 'of said arms.

5..In a calipering-device consisting'of YaY handle, av pairY of arms pivotally ineiinted thereom,agtriggerY securedY to Vone of said l arms. gearingcarriedjby the armsandpoperj .atively Yconnected with the trigger whereby amovementmofthe trigger 'relatii'feftofv said Y c handle is I'corr espe rrdingly .transferredin the Y Opposite direction to the other arm and a dial for indicating the degree of movement of said arms.

6. In a calipering device consisting of a handle, a pair of arms pivotallyrmounted thereon, a trigger secured to one of said arms, gear means carried by the arms and operatively connected* with the trigger whereby a movement of the trigger relative to said handle is correspondingly transferred in the opposite direction to the other arm, and a rotatable dial geared to said gear means for indicating the degree of movement of said arms.

7. In a calipering device consisting of a handle, a pair of arms pivotally mounted thereon, a trigger secured to one of said arms, gear means carried by the arms and operatively connected with the trigger whereby a movement of the trigger relative to said handle is correspondingly transferred in the opposite direction to the other arm, and a stop for limiting` the degree of movement of said arms in one direction.

8. In af calipering device consisting of a handle, a pair of arms pivotally mounted thereon, a trigger secured to one of said arms, gear means carried by the arms and operatively connected Vwith -the trigger whereby a movement of the trigger relative to said handle is correspondingly trans ferred in the opposite' direction tothe other arm, and an adjustable stop for limiting the degree of movement of said arms in one direction.

9. Ina calipering device consisting of a handle. a pair oi arms pivotally mounted thereon, a positive means on one of said arms and gear means carried by the arms and having operative connection with said positive means whereby a movement of one ci said arms relative to said handle is correspondingly transferred in the opposite direction to the other arm, a spring tension means carried by said pivot for moving the arms in the return direction and a stop for limiting the degree of movement of said arms caused bv the spring tension means.

10. In a calipering device consisting of a handle, a pair of arms pivotally mounted thereon, a gear segment arranged on each arm, gearing carried by one of said arms intermeshing with said gear Y segments whereby the arms are moved simultaneously in opposite directions, and a trigger secured to one oi said arms and operatively connected with the gearing and adapted to cooperate with said handle for causing said movement.

11. In a calipering device consisting of a handle, a pair of arms pivotally mounted thereon, gear segment arranged on each arm. gearing intermeshing therewith -whereby the arms are moved together relatively to said handle in opposite directions, a rota- Vtable dial mounted on said handle and means on the dial having operative connection with the gearing for rotating the dial in accordance with the movements ofthe i LI'HIS.

12. In a calipering device consistingoil a handle, a pair of arms pivotallymounted thereon, a gear segment arranged on each table dial mounted on said handle and a multiplying gear having operative connection with the intermeshing gear for increasingly rotating the dial in accordance with the movements of the arms.

13. In a calipering device consisting ofa handle, a pair of arms pivotally mounted thereon, a gear segment arranged on each arm, a gearing intermeshing therewith whereby the arms are moved together relatively to said handlein opposite directions, a rotatable dial, a spur gear attached thereto, and a gearfsegment having connection with the gearing and adapted to mesh with the spur gear to rotate the dial in accordance with the movements .of the arms.

14E. .In a'calipering deviceconsistingof a handle, a pair of arms pivotally mounted thereon, means connected with the arms whereby a movement of one of said arms relatively to said handle is correspondingly transferred in the opposite directionto the other arm and a stop located on the handle adapted to coact with one of the movable arms for limiting the degree of movement of said arms.

15. In a calipering device consisting of a handle, a pair of arms pivotally mounted thereon, means carried by the arms whereby a movement of one of said arms is correspondingly transferred in the opposite direction to the other arm and an adjustable stop located on the handle adapted to coact with one of the movable arms for limiting the degree of movement of said arms.

16. In a calipering device consisting oi a handle, a pair of arms pivotally mounted thereon, means carried by the arms whereby a movement of one of said arms relatively to said handle is correspondingly transferred in the opposite direction to the other arm and a stop mechanism consisting of an adjustable member arranged on the handle and adapted to coact with one of the movable arms for limiting the degree of movement of said arms.

17. In a calipering device consisting of a handle, a pair of arms pivotally mounted thereon, gear means carried by` the arms whereby a movement of one of said arms relatively to said handle is correspondingly transferred in the opposite direction to the other arm and a stop mechanism consisting of an adjustable screw member arranged on the handle'and adapted to coact With one of the movable arms for limiting the degree of ymovement of said arms.

18. In a calipering device consisting of a 5 handle, a pair of arms pivotally mounted thereon, means carried by the arms whereby Vva movement of one of said arms relatively to said handle is correspondingly transferred in the opposite direction to the other llo varm and a-stop mechanism consistingof a housing located on .the handle, an adjustable member Within the housing, and means onv "-zone of the,V movable arms coacting with the adjustable screw member for limiting the degree of movement of said arms. f

20. In acalipering device consisting of a handle, a pair of arms pivotally.v mounted fwthereon, means carried by the arms whereby copies of this patent may be @tamed fa? a movement-of one of said arms relatively to said handle is correspondingly .transferred in the opposite direction to the other arm and a stop meehanismconsisting of a housing located. on the handle, lan adjustable f Y member Within one endof the housing, and

means carried by one ofthe movable arms and adapted to abut against the end of the adjustable member Within `the housing for limiting Y the"v degree of Y movement I of Vsaid arms. e Y Y 21. In a calipering device consisting Vot a thereon, means carried by the arms whereby a movement of one of said armsV relatively` vto said handle is correspondingly trans- Vferred in the opposite direction to the other arm and a'stop mechanism-consisting of a housing located on the handle, an Vadjustable cured to one of the movable armsV Vand adapted to coact With the'V adjustable member vWithin the housing for limitingV t-he'degree of movement of said arms. j A

In testimony whereof Iaiix my signaturev 'in the presence 'of tWo Witnesses.V i Y `VLADISLAV KAPLAN.

Witnesses:

. v CHAs.`H.-B. STEFAULK,

E. L 'KNUPFEa handle,'a pair or armslpivotally mounted 50Y Vmemberflvvithin the housing,` a'plunger se- Y ve cents each, by addressing the Commissioner-ref Patents, Y Washington, I). C. Y 

